Electric-railway bond.



No. 800,030. PATENTED JUNE 9, 1908.

J.'DOLAN.

ELECTRIC RAILWAY BOND.

APPLICATION FILED JUNE 16.1906.

Holman;

IlllllllgljljlIlIlI-HH i UNITED STATES JOHN DOLAN, OF DAYTON, OHIO.

ELECTRIC-RAILWAY BOND.

Specification of Letters Patent.

Patented June 9, 1908.

Application filed June 15, 1906. Serial No. 321,800.

To all whom it may concern:

Be it known that 1, JOHN DOLAN, a citizen of the United States, residingat Dayton, in the county of Montgomery and State of Ohio, have inventedcertain new and useful Imrovements in'Electric-Railway Bonds; and

do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the figures of reference marked thereon,which form a part of this specification.

This invention relates to new and useful improvements in bonds forelectrically connecting the adjacent ends of the rails of electricrailways.

The object of the invention is to provide a rail bond with twointegrally joined lugs at each end which are united to the adjacent endsof the rails by compressing said lugs within openings in said rail endsand thus dis ensing with the necessity of riveting the en s of the lugsagainst the rail on one side or the bonds on the other side. Inconnection with such means for rigidly uniting the bond terminals,suitable'space is provided for soldering the inner sides of the bondterminals .30 with the adjacent surface of the rails, as

hereinafter set forth in the specification and claim.

Preceding a detail description of the invention, reference is made tothe accompanying drawings, of which V Figure 1, is a side elevation of arail joint with my improved bond forming an electrical connectionbetween the rails. Fig. 2, is a top view of the bond detached from therails. Fig. 3, is an elevation of the side of the bond containing theintegrally-united compression lugs. Fig. 4, is a cross sectional view ofa rail showing an end or terminal of the bond.

In a detail description of the invention, similar reference charactersindicate corresponding parts.

The bond 3 may be of any desired shape, observing in each case thenecessity of a due amount of resiliency in the body portion of the bond.In. the drawings I have lllustrated a common form of rail bondconsisting of soft copper strips or laminations having two ends orterminals 2 2 solidified. U .on these terminals there are provided sustantially flat surfaces which lie adjacent to the rail ends 1 when thebond is united to the rails.

These flat surfaces of the bond terminals are preferably slightlydepressed or they may be provided with a multiplicity of short spurs orprojections which provide suitable space for the running of solderbetween the bond terminals and the rails in electrically uniting thebond to the rails.

Upon each end or terminal of the bond there are integrally united twolugs 5 which project from the portions of the terminals between whichand the adjacent rail ends the solder is placed. The integrally unitedcompression lugs 5 are of a length approximately equal to the thicknessof the rail flange so that when said lugs are compressed into openingsin said rail flange, their ends will ie approximately flush with thesides of the rail flanges opposite the bond terminals. These compressionlugs, owing to their being tightly compressed within the openings in therail flanges, require no riveting, but on the contrary, a more suitableconnection is thus obtained by compressing said lugs within theapertures in the rail flanges. Surrounding the base of each of theintegrally-united compression lugs 5 is an annular shoulder 6 whichprevents the surfaces of the bond terminals making contact with theadjacent surfaces of the rails and thus provides suitable space betweensaid lugs and between the bond terminals and the adjacent rail surfacesfor the solder. The terminals, together with the compression lugs aretinned re aratory to their attachment to the raifs, by immersing saidterminals in a bath of solder.

I claim:

A rail bond composed of laminated strips having solidified terminalseach of which has two integrallyjoined non apertured lugs adapted tounite the bond terminals to adj acent ends of rails by compressin saidlugs into openings in the rails provided therefor, the lengths of saidlugs being a proximately equal to the portions of the ral s penetratedthereby, and each'of said lugs being rovided at its base with asurrounding shou der by means of which suitable space is providedbetween the bond terminals and the rails for the application of solder.

In testimony whereof I aff x my signature, in presence of two witnesses.

JOHN DOLAN.

Witnesses:

Tnos. E. HOWELL,

R. J. MOOARTY.

